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On the structure of the upper mantle
Bulletin of the Seismological Society of America, 1966Abstract From apparent velocities of first arrivals across the Tonto Forest array for epicentral distances from 11° to 29° Niazi and Anderson derived a structure of the upper mantle deviating markedly from other structures as determined of late. It is found that on a different interpretation their data are in good accord with the Lehmann
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HETEROGENEITY OF THE UPPER MANTLE
International Geology Review, 1992A. V. Yegorkin, S. L. Kostyuchenko
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